I think he was just pointing out that you can have a great rivalry without a completely even record. I don't think anyone would argue NU-CU is near the same level at OSU-UM (though I could argue that, for the Nebraska/Colorado fans, it feels every bit as intense and important many years) .
With rivalries I think the big thing is always "what have you done for me lately," not overall record. Michigan may have the lead, but OSU has dominated so thoroughly as of late that I imagine it brings little comfort to Wolverine fans. The Huskers have a ridiculous lead in their series with KU (which has been going on for over 100 straight years), but I guarantee every Nebraska fan feels that we're the ones out for redemption this year.